Police Walkie Talkie Sound Message Tone Link [portable]

You may need to use iTunes/Finder to create a .m4r file and transfer it to your iPhone as a custom text tone. Technical Characteristics of Police Radio Audio

A constant, subtle white noise or crackling that fluctuates with the transmission. police walkie talkie sound message tone link

Use any audio editor or code (e.g., generate a 1000 Hz sine wave segment) to produce this. You may need to use iTunes/Finder to create a